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Commit 6ac1f3b5 authored by Saurav Kashyap's avatar Saurav Kashyap Committed by James Bottomley
Browse files

[SCSI] qla2xxx: Avoid poisoning in the response queue for ISPFX00. 



Signed-off-by: default avatarGiridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: default avatarSaurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent d68b3e01

drivers/scsi/qla2xxx/qla_mr.c

+8 −7
Original line number Diff line number Diff line
@@ -2821,16 +2821,22 @@ qlafx00_process_response_queue(struct scsi_qla_host *vha, 
{

	struct sts_entry_fx00 *pkt;

	response_t *lptr;

	uint16_t lreq_q_in = 0;

	uint16_t lreq_q_out = 0;



	while (RD_REG_DWORD((void __iomem *)&(rsp->ring_ptr->signature)) !=

	    RESPONSE_PROCESSED) {

	lreq_q_in = RD_REG_DWORD(rsp->rsp_q_in);

	lreq_q_out = RD_REG_DWORD(rsp->rsp_q_out);



	while (lreq_q_in != lreq_q_out) {

		lptr = rsp->ring_ptr;

		memcpy_fromio(rsp->rsp_pkt, (void __iomem *)lptr,

		    sizeof(rsp->rsp_pkt));

		pkt = (struct sts_entry_fx00 *)rsp->rsp_pkt;



		rsp->ring_index++;

		lreq_q_out++;

		if (rsp->ring_index == rsp->length) {

			lreq_q_out = 0;

			rsp->ring_index = 0;

			rsp->ring_ptr = rsp->ring;

		} else {
@@ -2842,7 +2848,6 @@ qlafx00_process_response_queue(struct scsi_qla_host *vha, 
			qlafx00_error_entry(vha, rsp,

			    (struct sts_entry_fx00 *)pkt, pkt->entry_status,

			    pkt->entry_type);

			goto next_iter;

			continue;

		}
@@ -2876,10 +2881,6 @@ qlafx00_process_response_queue(struct scsi_qla_host *vha, 
			    pkt->entry_type, pkt->entry_status);

			break;

		}

next_iter:

		WRT_REG_DWORD((void __iomem *)&lptr->signature,

		    RESPONSE_PROCESSED);

		wmb();

	}



	/* Adjust ring index */